I am trying to register ambari agent on my datanodes vai the ambari server web interface and getting below error while starting the ambari agent script. I have setup a local yum repository AMBARI-2.2.1.0 and HDP-2.4.0.0. I was successfully able to install/start the ambari server but while registering the ambari agent i am facing error - "Ambari Agent host cannot reach Ambari Server 'ns2.dns2go.com:8080'". I am not sure where is ns2.dns2go.com coming into picture. ========================== Creating target directory... ========================== Command start time 2017-04-05 12:33:58 Connection to www.hdpdn1.rajlab.com closed. SSH command execution finished host=www.hdpdn1.rajlab.com, exitcode=0 Command end time 2017-04-05 12:33:58 ========================== Copying common functions script... ========================== Command start time 2017-04-05 12:33:58 scp /usr/lib/python2.6/site-packages/ambari_commons host=www.hdpdn1.rajlab.com, exitcode=0 Command end time 2017-04-05 12:33:58 ========================== Copying OS type check script... ========================== Command start time 2017-04-05 12:33:58 scp /usr/lib/python2.6/site-packages/ambari_server/os_check_type.py host=www.hdpdn1.rajlab.com, exitcode=0 Command end time 2017-04-05 12:33:58 ========================== Running OS type check... ========================== Command start time 2017-04-05 12:33:58 Cluster primary/cluster OS family is redhat6 and local/current OS family is redhat6 Connection to www.hdpdn1.rajlab.com closed. SSH command execution finished host=www.hdpdn1.rajlab.com, exitcode=0 Command end time 2017-04-05 12:33:59 ========================== Checking 'sudo' package on remote host... ========================== Command start time 2017-04-05 12:33:59 sudo-1.8.6p3-15.el6.x86_64 Connection to www.hdpdn1.rajlab.com closed. SSH command execution finished host=www.hdpdn1.rajlab.com, exitcode=0 Command end time 2017-04-05 12:33:59 ========================== Copying repo file to 'tmp' folder... ========================== Command start time 2017-04-05 12:33:59 scp /etc/yum.repos.d/ambari.repo host=www.hdpdn1.rajlab.com, exitcode=0 Command end time 2017-04-05 12:33:59 ========================== Moving file to repo dir... ========================== Command start time 2017-04-05 12:33:59 Connection to www.hdpdn1.rajlab.com closed. SSH command execution finished host=www.hdpdn1.rajlab.com, exitcode=0 Command end time 2017-04-05 12:33:59 ========================== Changing permissions for ambari.repo... ========================== Command start time 2017-04-05 12:33:59 Connection to www.hdpdn1.rajlab.com closed. SSH command execution finished host=www.hdpdn1.rajlab.com, exitcode=0 Command end time 2017-04-05 12:34:00 ========================== Copying setup script file... ========================== Command start time 2017-04-05 12:34:00 scp /usr/lib/python2.6/site-packages/ambari_server/setupAgent.py host=www.hdpdn1.rajlab.com, exitcode=0 Command end time 2017-04-05 12:34:00 ========================== Running setup agent script... ========================== Command start time 2017-04-05 12:34:00 Host registration aborted. Ambari Agent host cannot reach Ambari Server 'ns2.dns2go.com:8080'. Please check the network connectivity between the Ambari Agent host and the Ambari Server Connection to www.hdpdn1.rajlab.com closed. SSH command execution finished host=www.hdpdn1.rajlab.com, exitcode=1 Command end time 2017-04-05 12:35:03 ERROR: Bootstrap of host www.hdpdn1.rajlab.com fails because previous action finished with non-zero exit code (1) ERROR MESSAGE: tcgetattr: Invalid argument Connection to www.hdpdn1.rajlab.com closed. STDOUT: Host registration aborted. Ambari Agent host cannot reach Ambari Server 'ns2.dns2go.com:8080'. Please check the network connectivity between the Ambari Agent host and the Ambari Server Connection to www.hdpdn1.rajlab.com closed. also when i checked the ambari-server logs i could see some bootstrap mesgs. [root@hdpserver yum.repos.d]# tail -50 /var/log/ambari-server/ambari-server.log STDOUT: Host registration aborted. Ambari Agent host cannot reach Ambari Server 'ns2.dns2go.com:8080'. Please check the network connectivity between the Ambari Agent host and the Ambari Server tcgetattr: Invalid argument Connection to www.hdpdn1.rajlab.com closed. ERROR:root:ERROR: Bootstrap of host www.hdpdn3.rajlab.com fails because previous action finished with non-zero exit code (1) ERROR MESSAGE: tcgetattr: Invalid argument Connection to www.hdpdn3.rajlab.com closed. STDOUT: Host registration aborted. Ambari Agent host cannot reach Ambari Server 'ns2.dns2go.com:8080'. Please check the network connectivity between the Ambari Agent host and the Ambari Server tcgetattr: Invalid argument Connection to www.hdpdn3.rajlab.com closed. ERROR:root:ERROR: Bootstrap of host www.hdpdn2.rajlab.com fails because previous action finished with non-zero exit code (1) ERROR MESSAGE: tcgetattr: Invalid argument Connection to www.hdpdn2.rajlab.com closed. STDOUT: Host registration aborted. Ambari Agent host cannot reach Ambari Server 'ns2.dns2go.com:8080'. Please check the network connectivity between the Ambari Agent host and the Ambari Server tcgetattr: Invalid argument Connection to www.hdpdn2.rajlab.com closed. INFO:root:Finished parallel bootstrap 05 Apr 2017 12:35:05,396 INFO [pool-11-thread-1] BSHostStatusCollector:55 - Request directory /var/run/ambari-server/bootstrap/4 Could someone pease guide me how to proceed further. I have tried to install manually the ambari-agent as well on each node but still i am not able to register the host from ambari server interface. Kindly help ... View more